Parting strip for concrete roadways and pavements



' May 24, 1938. E. w. BURGESS PARTING STRIP FOR CONCRETE ROADWAYS AND PAVEMENTS v2 Sheets-Sheet 1 Filed Feb. 5, 1934 INVENTOR.

Edward WBur5/ess BY ATTORNEY.

.. May 24, 1938. E w B R E 2,118,340

PARTING STRIP FOR CONCRETE ROADWAYS AND PAVEMENTS Filed Feb. 5, 1934 2 Sheets-Sheet 2 INVENTOR. Edward W Burgess ATTORNEY.

UNITED STATES FATE oFFlcE PARTING STRIP FOR CONCRETE ROAD- WAYS AND PAVEMENTS Edward W. Burgess, Milwaukee, Wis, assignor to A. 0. Smith Corporation,

Milwaukee, Wis.,

11 Claims.

This invention relates to a parting strip for concrete roads and pavements and is applicable to dividing the pavement on longitudinal and transverse lines where it is desired to prevent irregular cracking of the pavement and to secure and interlock the sections thereof together.

The object ofthe invention is to provide a combined sheet metal parting strip and tie bar structure which is light in weight and simple to manufacture and which will more efficiently hold and interlock the sections of the paving material together.

Another object is to provide improved means.

for securing the sections of the sheet metal parting strip end to end.

Another object is to provide. improved means for supporting the tie-bar member with respect to the parting strip.

Other objects will appear in connection with the description of the preferred embodiment illustrated in the accompanying drawings.

In the drawings: Figure l is a top pl an view of a center strip and tie bar made in accordance with the invention;

Fig. 2 is a side elevation of the center strip without the tie bar;

Fig. 3 is an enlarged transverse vertical section of the center strip on line 3-3 of Fig. 1, showing the means for effecting interlocking of and illustrating the strip in the pavement;

horizontal section through a strip showing the means for section taken on line 5-5 Fig. 6 is an end view of the center strip; Fig. 7 is a transverse section on line of Fig. 2 showing. means for receiving the and clips for joining the sections end to end;

Fig. 8 is an end view of one of the clips for securing the sections end to end;

Fig. 9 is a side elevation of a joint between the ends of two center strip sections showing the clip in place;

Fig. 10 is a top plan ends of two tie bars an view showing a joint at the d a clip for the same; and

Fig. 11 is a transverse section on line Il-ll of Fig. 10.

The parting metal strip l adapted crete or other paving position with the top beneath the upper sur strip comprises, in general, a sheet to be embedded in conmaterial 2 in a vertical edge of the strip slightly face of the paving material as shown in Fig. 3, and a tie bar 3, which is preferably continuous, extending horizontally in a zig-zag or sinuous formation across the joint to tie the sections of paving material together as shown in Figs. 1 and 3.

The center strip I has a vertical upper edge portion 4 and the lower portion of the strip is bent in opposite directions alternately to provide inclined projections 5 and complementary recesses 6 for receiving paving material on opposite sides of the strip. The center strip is preferablyformed by a pressing operation in which the metal of the lower portion of the strip is drawn to provide the alternately inclined portions 5.

Alternate inclined projections 5 have a longitudinal slot 1 extending substantially for the full length of each projection for receiving the tie bar 3 and through which the tie bar may be inserted from one side of the strip as illustrated in Fig. l. The height of the slots 1 in the center strip is dependent upon the desired position of the bar 3 in the pavement, and is preferably approximately midway in the height of the center strip as illustrated in Figs. 2 and 3.

The tie bar 3 is preferably formed from a continuous rod and has notches 8 formed therein at locations where the bar engages the center strip I.

The metal of the center strip I at the ends of the slots 1 is deformed to provide a semi-circular curved groove-like portion 9 for receiving the tie bar 3. On either side of each curved portion 9 is a fold ill in the opposite direction from the normal plane of the sheet, the portion 9 and folds I0 being adapted to provide a recess for receiving the tie bar and securing it in a horizontal position to prevent its tipping.

The notches 8 in the tie bar are suitably spaced apart to receive the deformed portions 9 and ll]. of the center strip and thereby locate the tie bar definitely with respect to the center strip to insure that the dowel extends equidistant on opposite sides of the strip.

The parting strip is preferably formed in definite lengths, such as ten feet and the sections of the strip are joined end to end by means of a clip illustrated in Figs. '7, 8, and 9. For this purpose, the center strip 1 is provided with two longitudinally extending ribs II at each end. At a predetermined distance from the end of the strip, the ribs H are slit and one portion l2 thereof bent outwardly to receive the clip l3 as shown in Fig. '7. The clip l3 consists of a sheet metal plate having its upper and lower edge portions curved or beaded on a radius similar to the curvature of the ribs II and having projections l4 pressed in its upper and lower edges for locating the clip and preventing its displacement during and after assembly. By employing a clip such as that shown in Figs. 6 to 9, inclusive, the center strips I are joined end to end in abutting relation and interlocked from relative transverse and a vertical movement. The curved edge portions of the clip l3 stiffen the clip and cooperate with the ribs II in interlocking the strips.

The tie bar may be secured at its ends to another section of tie bar by means shown in Figs. 10 and 11. As shown, the tie bars are provided with sufiicient length of material to have an overlapping section l5 located at an outer bend of the bar. A U-shaped clip E6 of sheet metal is pressed over the overlapping ends as shown in Figs. 10 and 11, the clip being formed with ribs l! to hold the same in position.

The parting strip may be employed centrally of the roadway with the center'stripl extending longitudinally of the roadway and the tie bar 3 holding the two sides of the roadway together and assisting in interlocking the same, 'or the parting strip may be employed at a transverse joint between paving sections with the tie bar holding the sections'together end to end and the strip i i extending transversely-across the roadway. In either case, the alternating projections and recesses 5 and 6 form interlocking portions in the sections *of paving material which prevent relative vertical movement between the sections at the joint. The tie bar 3 tends to hold the sections together and prevent slippage with respect to the inclined portions 5 of the center strip.

In handling the parting strip, the center strip I and tie bar 3 may be shipped separately with several similar parts tied in suitable bundles, and then the parts may be assembled at the time of laying the road. After the parts are assembled, the tie bar 3 tends to stiffen the sheet metal strip l and prevent its displacement by reason of the continuous zig-zag shape of the bar 3 and of the notches 8 which tend to hold the strip l at the center line of the .bar.

Various modifications of the embodiment may be employed within the scope of the invention definedin the accompanying claims.

The invention is hereby claimed as follows:

1. A parting strip for pavements andhighways comprising a sheetmetal strip adapted to be disposed on edge in the paving material and a substantially continuous removable zig-zag tie bar extending laterally through horizontal slots in said strip and into the paving material on either side thereof, said tie bar :having means thereon for determining its position relative to said strip and for retaining the bar against displacement laterally relative to said strip, and said means effecting a resilient engagement between the tie bar and said strip.

2. A parting strip for pavements and highways comprising a sheet metal strip adapted to be disposed on edge in the-paving material and having lateral projections providing an interlock between the opposite sections of paving material, and a substantiallycontinuous tie bar extending substantially horizontally through .said strip and into the paving material onopposite sides there- 'of, the metal of the stripadjacent the tie bar and extending transversely between opposite projec- :tions of the strip being formed-to provide means to hold said bar in substantially horizontal ,posi- .tion andssaid-tiebarlbeing notchedon either side rial on opposite sides of the strip and the metal between said alternately displaced areas extending in a direction transverse to the strip, and a tie bar extending through horizontal slots in said strip and adjacent said transversely extending metal between alternate laterally displaced areas and into the paving material on opposite sides thereof, the metal of the strip extending transversely thereof between alternately displaced areas being formed to receive saidtie bar and to hold the same relative to said strip.

4-. A parting strip for pavements and highways comprising a sheet metal strip disposed on edge in paving material and having a straight vertical upper edge portion and a lower interlocking portion having the metal in alternate longitudinal areas thereof displaced laterally in opposite directions from the center line of the strip to provide alternate interlocking projections and recesses in the adjacent sections of paving material on opposite sides of the strip and the metal between said alternately displacedareas extending in a direction transverse to the strip, and a tie bar extending through said strip adjacent said transversely extending metal between alternate laterally displaced areas and into the paving 1na-,

terial on opposite sides thereof, the metal of the strip extending transversely thereof between alternately displaced areas being formed to receive said tie bar and to hold the samerelative to said strip, and the tie bar being notched von either side of said strip to prevent displacement of the bar. 5. A parting strip for pavements and highways comprising a sheetmetal strip disposed on edge in paving material and having a straight vertical upper edge portion and a lower interlocking portion havingthe metal in alternate longitudinal areas thereof displaced laterally in opposite directions from the center line of the strip to provide alternate interlocking projections and recesses in the adjacent sections of paving material on opposite sides of the strip; the laterally displaced areas on one side of said strip having longitudinal slots extending substantially for the fulllength thereof at a predeterminedheight in said strip, and a continuous sinuous or zig-zag tie bar inserted through said slots from one side of said strip and extending into the paving material substantially equally on opposite sides of said strip.

A parting strip for pavements and highways comprising a sheet metal strip ,disposed on edge in paving material a-ndhaving a straight vertical upper'edge portion and a lower interlocking portion having the metal in alternate longitudinal areas thereof displaced laterally in opposite directions from the center line of the strip to provide alternate interlocking projections and recesses in the adjacent sections of paving material on opposite sidesof the strip, the laterally'displaced areas on .one side of said strip having longitudinal slots extending substantially for the full length thereof at a predetermined height in said strip, and a continuous sinuous or zig-zag tie bar inserted through said slots from one side of said strip and extending into the paving material substantially equally on opposite sides of said strip, the metal of said strip between said alternate laterally displaced areas extending transversely of the strip and being formed to receive said tie bar and hold the same in a substantially horizontal position.

7. A parting strip for pavements and highways comprising a sheet metal strip disposed on edge in paving material and having a straight vertical upper edge portion and a lower interlocking portion having the metal in alternate longitudinal areas thereof displaced laterally in opposite directions from the center line of the strip to provide alternate interlocking projections and recesses in the adjacent sections of paving material on opposite sides of the strip, the laterally displaced areas on one side of said strip having longitudinal slots extending substantially for the full length thereof at a predetermined height in said strip, and a continuous sinuous or zig-zag tie bar inserted through said slots from one side of said strip and extending into the paving material substantially equally on opposite sides of said strip, the metal of said strip between said alternate laterally displaced areas extending transversely of the strip and being formed to receive said tie bar and hold the same in a substantially horizontal position, and said tie bar having notches therein along the longitudinal center line thereof to secure the same with respect to said strip and to thereby stiffen the latter.

8. In a parting strip for pavements and highways, a plurality of sheet metal center strips formed to provide interlocking projections and recesses between sections of paving material and arranged end to end in upright position in the pavement, said center strips having longitudinally extending beads at the ends thereof, each bead having an opening therein at a distance from the end of the strip, and a sheet metal clip extending across the joint between the strips and having portions extending through said openings in said beads to interlock the strips against relative transverse and vertical movement, the ends of said strips being free from slots.

9. In a parting strip for pavements and highways, a plurality of sheet metal center strips formed to provide interlocking projections and recesses between sections of paving material and arranged end to end in upright position in the pavement, said center strips being slit longitudinally at a predetermined distance from their ends, and a clip extending across the joint having portions engaging said slits for interlocking the strips against relative transverse and vertical movement the ends of said strips being free from slots.

10. In a parting strip for pavements and highways, a plurality of sheet metal strips arranged end to end and embedded in the paving material for parting sections of the paving material, tie bars extending through said strips and into the paving material on the opposite sides thereof, a tie clip securing the adjacent ends of the strips together and comprising a substantially fiat metal plate having its upper and lower longitudinal edges curved or ribbed to stiffen the same, and ribs extending longitudinally of said strips at the adjacent ends thereof and disposed to register with the curved edges of said clip the ends of said strips being free from slots.

11. In a parting strip for pavements and highways, a plurality of sheet metal strips arranged end to end and embedded in the paving material for parting sections of the paving material, tie bars extending through said strips and into the paving material on the opposite sides thereof, a tie clip securing the adjacent ends of each strip together and comprising a substantially flat metal plate having its upper and lower longitudidnal edges curved or ribbed to stifien the same, and ribs extending longitudinally of said strips at the adjacent ends thereof and disposed to register with the curved edges of said clip, said ribs being slit for a portion of their length to receive the edges of said clip.

EDWARD W. BURGESS. 

